A. 785rad/s B. 628rad/s C. 50rad/s D. 100rad/sB

Freeti2020-05-20 6

问题

选项 A. 785rad/sB. 628rad/sC. 50rad/sD. 100rad/s

答案B

解析[img]/upload/tiku/139/342479_1.jpg[/img]

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